Gas burner



Nov. 11, 1941.

L. s. KAUFFMAN AL 2,262,683

GAS BURNER Filed April 19, 1940 2 Sheets-Sheet l 3nnentor it). W

Gttomcg Nov. 11, 1941. L. s. KAUFFMAN ETAL 2,262,683

GAS BURNER Filed April 19, 1940 2 Sheets-Sheet 2 l'mnentor arm/r Jd-LL/ M- Cittomcg Patented Nov. 11, 1941 GAS BURNER Lester 8. Kanflman and Harold C. Reinhart, St.

Louis, Mo., assignors to American Stove Conill ny, St. Louis, Mo., a corporation of New Jer- Application April 19, 1940, Serial No. 330,609

6Claims.

This invention relates to improvements in gas burners which consist of a ring-like structure which comprises a plurality of concentric walls from which an inner and an outer flame are produced.

In the present case the burner involves a body portion which is provided with upwardly extending concentric walls and a cap therefor which is provided with concentric depending walls. The particular improvement is on Patent No. 1,714,409 dated May 21, 1929, granted to A. Stockstrom and I. V. Brumbaugh and assigned to the American Stove Company of St. Louis, Mo.

Said patent is for a burner which is composed of two different metals. The body consists of cast iron or the like which has a high melting point and a cap consisting of a metal having a melting point lower than that produced by a, gas flame, and the present improvement pertains to the specific and novel construction of the walls of the patented burner.

One object of the invention is to construct a burner consisting of a body which has concentric upwardly extending walls, and provide a cap for said body that has depending concentric walls which abut the upper ends of said body walls, said abutting walls having respectively outer and inner gas passages forming lower and upper frames, and said inner concentric walls of the body and cap provided with engaging screw threads for connecting said body and cap.

Other objects of the invention will appear from the following description.

Referring now to the drawings,

Figure 1 is a-top plan view.

Figure 2 is a vertical sectional view on line 2-2 of Figure 1.

Figure 3 is a detached side elevation of the cap.

Figure 4 is a top plan view of a modification shown in Figure I.

Figure 5 is a horizontal detached sectional view on line I! of Figure 6.

Figure 8 is a detached side elevation of the cap of the burner.

Figure 'l is a vertical sectional view on the line I-i of Figure 4.

Referring to Figures 1, 2 and 3, the burner consists essentially of a body portion A and a cap 2 for said body. The body consists of cast iron, or the like, which has a high melting point while the cap is composed of a die-cast aluminum alloy which has a melting point below that produced by a gas flame. Said patent to Stcckstrom and Brumbaugh describes how the die-cast alloy is kept at a temperature below that produced by the gas in their burner, and the said patent explains why the die-cast alloy is used etc.

Referring to Figs. 1 to 3, the cap 2 is provided with depending or thickened wall 4 provided with teeth 5 and an inner concentric depending inner wall 9 provided with teeth It. These teeth engage the upper ends of the outer and inner walls I and 1, respectively of the body A. The outer and upper gas ports 6 are between the teeth 5 while the inner and lower gas ports II are between the teeth I0. In this construction the cap 2 and its teeth are composed of some die-cast metal such as aluminum or an alloy thereof, and the body A is composed of cast iron. The die-cast metal has a melting point which is much lower than produced by a gas flame while the cast iron has a melting point which is much higher. This is broadly described in said patent to Stockstrom et al. Specifically. the patent and the construction here shown are different, as will be understood from the following description.

The present improvement here shown will now be explained. It consists in providing means for uniting the cap 2 and body A. Referring to Figures 1 to 3 inclusive this uniting means consists of a ring member I2 having screw threads I3 which engage with similar screw threads formed in the inner body .wall 1. This ring member I2 is located below the cap 2 but it is attached to said cap by a plurality of fingers I4. By means of the screw threaded ring I2 the cap 2 and body are detachably united.

In Figures 4 to I inclusive is illustrated a modified manner of uniting said cap 2 and the body of the burner by means of screw threads. This modification consists in providing the upper end of the body inner wall I with an upwardly extending skirt I1 which surrounds the upper end of said wall and is separated therefrom to form a gas passage'between it and said body wall I. The outer lower end of the wall 9 is provided with screw threads I. which engage screw threads that are formed on the inner side of said skirt II. The wall I is provided with the same teeth I I having between them the inner and lower gas ports I I.

The upper ends of the body walls I and 1 are inclined so as to make a gas-tight fit with the cap teeth 8 and II.

rapidly and cheaply assembled.

2 aaoaess We claim I 1. A gas burner comprising a body having two upwardly extending concentric walls each having smooth tops, a cap'provided with two downwardly extending concentrically arranged walls having their ends directly above the tops of said body walls, the inner and outer cap walls having teeth above but in engagement with said smooth tops of the body walls, the cap inner wall provided with screw threads positioned above said teeth and the inner body wall having a' screw threaded member which extends around said teeth and engage the screw threads of the cap inner wall.

5 2. A gas burner constructed as defined in claim 1 having the screw threaded members cut out to iorm communication between the space intermediate body walls and the spaces between the teeth located at the lower end oi the cap inner wall.

j 3. A gas burner comprising a body portion provided with two .upwardly projecting concentric walls having smooth tops, a cap having two con- 4. A gas burner constructed as defined in claim 3 with the screw threads at the lower end oi. said inner cap wall consisting of a ring which is separated from said wall but is attached to the wall by a plurality of fingers.

5. A gaseous fuel burner comprising, a body portion'and a burner cap therefor, said body portion having upwardly projecting spaced walls each of which is continuous in length, one of said walls being an inner and the other an outer wall, the upper ends of both of said walls being smooth, said inner wall adjacent its upper end being provided with threads, said cap at its under side having inner and outer spaced downwardly projecting endless walls each of which is provided with depending teeth disposed above and \engaging the upper smooth ends of said body centric depending walls provided with teeth engaging said smooth ends to form inner and outer gas ports, the inner body wall provided with screw threads at its inner side and below said teeth, and the lower end of said cap inner wall carrying screw threads which engage said screw threads of the body inner wall for uniting said cap and body.

f LESTER s. KAUFFMAN. HAROLD c. REINHART. 

